[Shiffman] The Nature of Code - Forces

http://www.shiffman.net/teaching/nature/forces/

my preparation for RB study:

 weight vs. mass http://en.wikipedia.org/wiki/Weight
= absolute vs. relative

gravitational force
http://en.wikipedia.org/wiki/Gravitational_force
Earth's gravity http://en.wikipedia.org/wiki/Earth%27s_gravity
    Free fall http://en.wikipedia.org/wiki/Free-fall

     지구의 반지름
    에라토스테네스 (Eratosthenes, 276 BC - 194 BC) http://100.naver.com/100.nhn?docid=110548
        http://en.wikipedia.org/wiki/Eratosthenes
        cf. 에라토스테네스의 체 (Erathosthenes'sieve) http://100.naver.com/100.nhn?docid=716415


     지구의 질량

    ref.
    http://en.wikipedia.org/wiki/History_of_gravitational_theory

        브라마굽타 [Brahmagupta, 598~665?] http://100.naver.com/100.nhn?docid=80291
            http://en.wikipedia.org/wiki/Brahmagupta
 

 force
http://en.wikipedia.org/wiki/Force
Force is defined as the rate of change of momentum with time:    \vec{F} = {\mathrm{d}\vec{p} \over \mathrm{d}t}.
The quantity \vec{p} = m \vec{v} (where m\, is the mass and \vec{v} is the velocity) is called the momentum. This is the only definition of force known in physics (first proposed by Newton himself). If the mass m is constant in time, then Newton's second law can be derived from this definition

http://en.wikipedia.org/wiki/Net_force

Newton’s Laws
제1법칙 - 관성의 법칙
제2법칙 - 가속도, 질량, 힘
제3법칙 - 작용/반작용의 법칙
http://www.lightandmatter.com/html_books/1np/ch04/ch04.html
http://www.physicsclassroom.com/Class/newtlaws/newtltoc.html

dissipative force - friction force, viscious force
gravitational force

momentum

torque <- rotation

stress <- deformation


Viscosity
http://en.wikipedia.org/wiki/Viscosity



 Friction
Hook's Law

spring

pendulum



cf.
http://en.wikipedia.org/wiki/Deformation